Haruna-class

The Haruna class was a series of helicopter-carrying destroyers (DDH) operated by the Japan Maritime Self-Defense Force (JMSDF). The class originated from a shift in Japanese naval planning during the 1960s. After a proposal for a single helicopter carrier (CVH) was cancelled, the JMSDF opted to disperse fleet aviation assets among destroyers. The Haruna class was designed to serve as a hub for this dispersed aviation concept, providing logistics and maintenance support for aircraft.

The design featured a large central hangar capable of housing three helicopters and a 50-meter aft flight deck equipped with a beartrap recovery system for operating HSS-2 anti-submarine helicopters. Initial weapon systems were situated on the forecastle deck. Between 1983 and 1984, the vessels underwent the Fleet Rehabilitation and Modernization (FRAM) program. This upgrade integrated the Naval Tactical Data System (NTDS) and the OYQ-6/7 combat direction system. Hardware additions during this period included Sea Sparrow launchers, Phalanx CIWS, and chaff launchers mounted on the superstructure.

Two vessels were constructed for the JMSDF. The lead ship, Haruna (DDH-141), was built by Ishikawajima-Harima HI and commissioned in 1973. It operated from Maizuru until its decommissioning in 2009. The second ship, Hiei (DDH-142), was built by Mitsubishi Heavy Industries and commissioned in 1974. It was homeported at Kure and remained in service until 2011. The class was succeeded by the Shirane class.